This patch set adds ability to choose a signal queue and
to read signals without dequeuing them.

Three new flags are added:
SFD_SHARED_QUEUE     -- reads will be from process-wide shared signal queue
SFD_PER_THREAD_QUEUE -- reads will be from per-thread signal queue
SFD_PEEK             -- don't dequeue signals

Cc: Serge Hallyn <serge.hal...@canonical.com>
Cc: Oleg Nesterov <o...@redhat.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: "Eric W. Biederman" <ebied...@xmission.com>
Cc: Al Viro <v...@zeniv.linux.org.uk>
Cc: Pavel Emelyanov <xe...@parallels.com>
CC: Cyrill Gorcunov <gorcu...@openvz.org>
Cc: Michael Kerrisk <mtk.manpa...@gmail.com>

-- 
1.7.11.7

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